Sustainable Development

Step 1: Understand the Sustainable Development Goals (SDGs). The United Nations adopted the Sustainable Development Goals (SDGs) in September 2015 as part of its 2030 Agenda for Sustainable Development. The SDGs are a set of 17 goals aimed at addressing global challenges, including poverty, inequality, climate change, environmental degradation, peace, and justice.
Step 2: Target year for achieving the SDGs. The proposed target year for achieving the 17 SDGs is 2030, as outlined in the 2030 Agenda. Step 3: Analyze the options. From the information: (1) Incorrect: The SDGs are 17, not 15, and the target year is not 2035. (2) Correct: The SDGs are 17, and the target year is 2030. (3) Incorrect: The SDGs are not 20, and the target year is not 2050. (4) Incorrect: The SDGs are not 18, and the target year is not 2047.

Step 1: Definition of microplastics. Microplastics are small plastic particles that pose significant environmental concerns due to their persistence in ecosystems. According to UNEP guidelines, microplastics are defined as plastic particles smaller than in size.
Step 2: Analyze the options. : Incorrect, as this size exceeds the defined range for microplastics. : Correct, as it is the maximum size limit for microplastics. : Incorrect, as this is within the range of microplastics but does not represent the maximum size. : Incorrect, as this is much smaller than the defined maximum size.